Roberts, I. G. (2007). Diachronic syntax. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Roberts, Ian G. Diachronic Syntax. Oxford ; New York: Oxford University Press, 2007.
Lua MLA (9ú heag.)Roberts, Ian G. Diachronic Syntax. Oxford University Press, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.